Johntoy Smart Putty You can create this Smart Putty from Johntoy completely the way you want it. Squeeze and knead and feel the stress flowing out of your body! But it will be even more fun: the body heat that comes into your Putty while kneading will change color! Insane? Specifications: Color red Gender: junior / unisex Material: rubber Package cross section: 8 cm Age: from 6 years Content: 1 Can with Smart Putty